If I install bottom restrictor, which games in Mame will suffer from that or will be unplayable at this point?
and
Can I play Geometry wars 3 on 2 joysticks with restrictors? How about one with restrictor and one without? How would that affect gameplay?
(I'm aware of push button issue with that setup)
Also
If I want to order Rotary setup by that I mean not just an upgrade but whole thing that's necessary (Joystick, restrictor, rotary attachment) What would be best to order to be most cost effective, what would be the final price?
Could you tell us about how the rotary feels like and plays comparing to a real rotary joystick?
99% of all Mame games were designed to be played with a joystick with a restrictor, ie 4-way or 8-way so there really isnt any issue there. There are very few analog games in Mame which require the full travel. In fact analog games can still be played even with the restrictor to some extent.
I cant answer the geometry Wars question unfortunately, I dont know this game.
There are 2 kinds of rotary joystick, the 12-position which has 12 detented positions when its turned, and the optical which has continuous rotation. This is the latter, but does not rule out playing the games which used the 12-position type. This stick has a far higher resolution than the original Happ optical stick but this can be reduced in Mame settings. The higher resolution means its more versatile and could be used for some games which originally used a spinner.
If you want to order everything it might be best to wait a week or so until we get a production run of U360 PCBs done with the connector for the encoder. Then you can order a lower-cost upgrade kit without a new PCB.